October 2023 - AMSAT-BB - mailman.amsat.org

Re: ISS SSTV
by Sasha Tim 27 Oct '23

27 Oct '23

Translation for the text at the bottom: "Center for technical education of children and professional orientation"

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Re: IO-117 status - we're back
by Jean Marc Momple 27 Oct '23

27 Oct '23

Hi Graham, Yes indeed, I just wish to confirm that I received many PICs from JYISAT and that it works well and very reliable. 73 Jean Marc (3B8DU) > On Oct 27, 2023, at 7:21 PM, graham shirville via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > > Hi Sasha, > > Thanks for the explanation…I had the same question my mind! > > Just for the record, a 1U CubeSat, JY1SAT, also successfully used SSDV to downlink a number of preloaded images from Jordan. > > As you can see it worked really well! http://sv2hwm.ddns.net/JY1SAT.php <http://sv2hwm.ddns.net/JY1SAT.php> > > The User Dashboard, based upon the FUNcube system, enabled one to “hole file” any missing blocks during subsequent orbits. > > Sadly a failure in the onboard MCU some months ago means that it can no longer provide these images. > > 73 > Graham G3VZV > > > From: Sasha Tim via AMSAT-BB <amsat-bb(a)amsat.org <mailto:[email protected]>> > Sent: Friday, October 27, 2023 2:58 PM > To: Zach Metzinger <zmetzing(a)pobox.com <mailto:[email protected]>>; Amsat - BBs <amsat-bb(a)amsat.org <mailto:[email protected]>> > Subject: [AMSAT-BB] Re: IO-117 status - we're back > > Hi Zach, > > The reason against JPEG is primarily because of the corruption capabilities. If the first packet is not received (which is often the case), the entire image will be corrupt. If a single packet is missed, it ruins the image for all of the packets after. > > Multiple satellites use raw JPEG in space currently, and it is not working well.' > > A better format to use would be SSDV (https://github.com/fsphil/ssdv <https://github.com/fsphil/ssdv>), which has been tested on HAB flights for a long time, and was originally implemented on an Atmega328! > > It retains the JPEG compression capabilities, while simultaneously protecting the imagery against potential packet loss. > > There were only three satellites that I know of that used SSDV in space, that is, GASPACS-1 and the Chinese Lunar Orbiter cubesats a while ago. > > On Thu, Oct 26, 2023 at 3:46 PM Zach Metzinger via AMSAT-BB <amsat-bb(a)amsat.org <mailto:[email protected]>> wrote: >> On 10/26/23 14:13, Sasha Tim via AMSAT-BB wrote: >> > Any projects working on getting into MEO: PLEASE put in a camera (and >> > transmit in a format that is not JPEG)! >> >> Hello Sasha, >> >> Cameras do require a license, at least for the US. Not insurmountable, >> but one has to consider this aspect. >> >> What's wrong with JPEG? You'd prefer GIF? (or TIFF?) :-) >> >> --- Zach >> N0ZGO >> >> ----------------------------------------------------------- >> >> Sent via AMSAT-BB(a)amsat.org <http://amsat.org/>. AMSAT-NA makes this open forum available >> to all interested persons worldwide without requiring membership. Opinions expressed >> are solely those of the author, and do not reflect the official views of AMSAT-NA. >> Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/ <https://www.amsat.org/about-amsat/> >> >> View archives of this mailing list at >> https://mailman.amsat.org/hyperkitty/list/[email protected] <https://mailman.amsat.org/hyperkitty/list/[email protected]> >> To unsubscribe send an email to amsat-bb-leave(a)amsat.org <http://amsat.org/> >> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org <https://mailman.amsat.org/> > ----------------------------------------------------------- > > Sent via AMSAT-BB(a)amsat.org <http://amsat.org/>. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions expressed > are solely those of the author, and do not reflect the official views of AMSAT-NA. > Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/ <https://www.amsat.org/about-amsat/> > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] <https://mailman.amsat.org/hyperkitty/list/[email protected]> > To unsubscribe send an email to amsat-bb-leave(a)amsat.org <http://amsat.org/> > Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org <https://mailman.amsat.org/>

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Re: ISS SSTV
by John Antonuk - AL7ID 27 Oct '23

27 Oct '23

picture copied in Fairbanks, Alaska 73, John Antonuk AL7ID(a)yahoo.com On Friday, October 27, 2023 at 07:44:41 AM AKDT, John Magliacane via AMSAT-BB <amsat-bb(a)amsat.org> wrote: I can confirm reception of PD120 SSTV transmissions from the ISS on 145.800 MHz during a 1530 UTC on 27-Oct-2023 in FN20xd (New Jersey). According to this website: https://r4uab.ru/2023/10/04/peredacha-izobrazhenij-sstv-s-mks-perenositsya-… the transmissions are expected to continue through 30-October-2023. 73 de John, KD2BD ----------------------------------------------------------- Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/ View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

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Re: ISS SSTV
by egon 27 Oct '23

27 Oct '23

I received three pictures on the last pass, noise free. Egon, VE6EGN On 27/10/2023 9:43 a.m., John Magliacane via AMSAT-BB wrote: > I can confirm reception of PD120 SSTV transmissions from the ISS on > 145.800 MHz during a 1530 UTC on 27-Oct-2023 in FN20xd (New Jersey). > > According to this website: > https://r4uab.ru/2023/10/04/peredacha-izobrazhenij-sstv-s-mks-perenositsya-… > > the transmissions are expected to continue through 30-October-2023. > > > 73 de John, KD2BD > > ----------------------------------------------------------- > > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions expressed > are solely those of the author, and do not reflect the official views of AMSAT-NA. > Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/ > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to amsat-bb-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org -- VE6EGN EGON

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Re: ISS SSTV
by John Magliacane 27 Oct '23

27 Oct '23

I can confirm reception of PD120 SSTV transmissions from the ISS on 145.800 MHz during a 1530 UTC on 27-Oct-2023 in FN20xd (New Jersey). According to this website: https://r4uab.ru/2023/10/04/peredacha-izobrazhenij-sstv-s-mks-perenositsya-… the transmissions are expected to continue through 30-October-2023. 73 de John, KD2BD

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FW: Re: IO-117 status - we're back
by graham＠shirville.com 27 Oct '23

27 Oct '23

Hi Sasha, Thanks for the explanation…I had the same question my mind! Just for the record, a 1U CubeSat, JY1SAT, also successfully used SSDV to downlink a number of preloaded images from Jordan. As you can see it worked really well! http://sv2hwm.ddns.net/JY1SAT.php The User Dashboard, based upon the FUNcube system, enabled one to “hole file” any missing blocks during subsequent orbits. Sadly a failure in the onboard MCU some months ago means that it can no longer provide these images. 73 Graham G3VZV From: Sasha Tim via AMSAT-BB <amsat-bb(a)amsat.org <mailto:[email protected]> > Sent: Friday, October 27, 2023 2:58 PM To: Zach Metzinger <zmetzing(a)pobox.com <mailto:[email protected]> >; Amsat - BBs <amsat-bb(a)amsat.org <mailto:[email protected]> > Subject: [AMSAT-BB] Re: IO-117 status - we're back Hi Zach, The reason against JPEG is primarily because of the corruption capabilities. If the first packet is not received (which is often the case), the entire image will be corrupt. If a single packet is missed, it ruins the image for all of the packets after. Multiple satellites use raw JPEG in space currently, and it is not working well.' A better format to use would be SSDV (https://github.com/fsphil/ssdv), which has been tested on HAB flights for a long time, and was originally implemented on an Atmega328! It retains the JPEG compression capabilities, while simultaneously protecting the imagery against potential packet loss. There were only three satellites that I know of that used SSDV in space, that is, GASPACS-1 and the Chinese Lunar Orbiter cubesats a while ago. On Thu, Oct 26, 2023 at 3:46 PM Zach Metzinger via AMSAT-BB <amsat-bb(a)amsat.org <mailto:[email protected]> > wrote: On 10/26/23 14:13, Sasha Tim via AMSAT-BB wrote: > Any projects working on getting into MEO: PLEASE put in a camera (and > transmit in a format that is not JPEG)! Hello Sasha, Cameras do require a license, at least for the US. Not insurmountable, but one has to consider this aspect. What's wrong with JPEG? You'd prefer GIF? (or TIFF?) :-) --- Zach N0ZGO ----------------------------------------------------------- Sent via AMSAT-BB(a)amsat.org <http://amsat.org> . AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/ View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org <http://amsat.org> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

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Re: IO-117 status - we're back
by Jean Marc Momple 27 Oct '23

27 Oct '23

Dave, Fully support your statement. I was amongst the early OM's on IO-117 and done a lot of experiment and QSO’s with it. IT IS JUST A GREAT BIRD enabling worldwide QSO particularly with the delayed transmission which I was amongst the first to experiment. One can do a satellite DXCC with this bird alone. Unfortunately not active on IO-117 these days as taken up with other projects. Have a nice WE. 73 Jean Marc (3B8DU) > On Oct 27, 2023, at 1:44 AM, David Pykett via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > > I totally disagree with you IO-117 has been a great success helping many to get countries via satellite that they never dreamed they would ever reach > > 73 > Dave G0IIQ > From: Sasha Tim via AMSAT-BB <amsat-bb(a)amsat.org> > Sent: Thursday, October 26, 2023 8:13:41 PM > To: Amsat - BBs <amsat-bb(a)amsat.org> > Subject: [AMSAT-BB] Re: IO-117 status - we're back > > Honestly, it would have been much better if they put in a camera there instead of the digipeater. > > Any projects working on getting into MEO: PLEASE put in a camera (and transmit in a format that is not JPEG)! > > ----------------------------------------------------------- > > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions expressed > are solely those of the author, and do not reflect the official views of AMSAT-NA. > Acceptable Use and Privacy Policies available at https://www.amsat.org/about-amsat/ > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to amsat-bb-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

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Re: IO-117 status - we're back
by Sasha Tim 27 Oct '23

27 Oct '23

Hi Zach, The reason against JPEG is primarily because of the corruption capabilities. If the first packet is not received (which is often the case), the entire image will be corrupt. If a single packet is missed, it ruins the image for all of the packets after. Multiple satellites use raw JPEG in space currently, and it is not working well.' A better format to use would be SSDV (https://github.com/fsphil/ssdv), which has been tested on HAB flights for a long time, and was originally implemented on an Atmega328! It retains the JPEG compression capabilities, while simultaneously protecting the imagery against potential packet loss. There were only three satellites that I know of that used SSDV in space, that is, GASPACS-1 and the Chinese Lunar Orbiter cubesats a while ago. On Thu, Oct 26, 2023 at 3:46 PM Zach Metzinger via AMSAT-BB < amsat-bb(a)amsat.org> wrote: > On 10/26/23 14:13, Sasha Tim via AMSAT-BB wrote: > > Any projects working on getting into MEO: PLEASE put in a camera (and > > transmit in a format that is not JPEG)! > > Hello Sasha, > > Cameras do require a license, at least for the US. Not insurmountable, > but one has to consider this aspect. > > What's wrong with JPEG? You'd prefer GIF? (or TIFF?) :-) > > --- Zach > N0ZGO > > ----------------------------------------------------------- > > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions > expressed > are solely those of the author, and do not reflect the official views of > AMSAT-NA. > Acceptable Use and Privacy Policies available at > https://www.amsat.org/about-amsat/ > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to amsat-bb-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Re: IO-117 status - we're back
by David Pykett 26 Oct '23

26 Oct '23

I totally disagree with you IO-117 has been a great success helping many to get countries via satellite that they never dreamed they would ever reach 73 Dave G0IIQ ________________________________ From: Sasha Tim via AMSAT-BB <amsat-bb(a)amsat.org> Sent: Thursday, October 26, 2023 8:13:41 PM To: Amsat - BBs <amsat-bb(a)amsat.org> Subject: [AMSAT-BB] Re: IO-117 status - we're back Honestly, it would have been much better if they put in a camera there instead of the digipeater. Any projects working on getting into MEO: PLEASE put in a camera (and transmit in a format that is not JPEG)!

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Re: IO-117 status - we're back
by Zach Metzinger 26 Oct '23

26 Oct '23

On 10/26/23 14:13, Sasha Tim via AMSAT-BB wrote: > Any projects working on getting into MEO: PLEASE put in a camera (and > transmit in a format that is not JPEG)! Hello Sasha, Cameras do require a license, at least for the US. Not insurmountable, but one has to consider this aspect. What's wrong with JPEG? You'd prefer GIF? (or TIFF?) :-) --- Zach N0ZGO

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